This time, the 20-year-old is calling on Myanmar's de facto leader Aung San Suu Kyi to stand up to the violence currently taking place in the country against the Rohingya Muslim population — and she's drawing on their shared status as Nobel Peace Prize laureates to do so.

The Rohingya are a Muslim minority from the Rakhine State in the predominantly Buddhist country of Myanmar, also known as Burma. As CNN explains, the stateless group, which is denied citizenship, has long faced persecution, as Myanmar considers them Bangladeshi, while Bangladesh considers them Burmese.

The United Nations estimates that 123,000 refugees have fled Myanmar into Bangladesh since August 25, when, according to the Washington Post, attacks on police outposts by Rohingya insurgents sparked violence from the country's military. Others are reportedly stranded and in need of basic supplies.

"Genocide is going on there," one refugee told CNN, as the military reported that nearly 400 people had been killed in the clash, most of them insurgents — while activists say many innocents, including women and children, have also been killed.

"Over the last several years, I have repeatedly condemned this tragic and shameful treatment. I am still waiting for my fellow Nobel Laureate Aung San Suu Kyi to do the same," Yousafzai wrote in her Twitter statement on the issue, calling for an end to the violence and arguing that the Rohingya people should be given citizenship in Myanmar. She also asked for other countries, including Pakistan, to provide aid to those fleeing violence. "The world is waiting and the Rohingya Muslims are waiting."

Aung San Suu Kyi, state counsellor of Myanmar, has received criticism for her failure to condemn the Rohingya crisis. Earlier this year, she denied ethnic cleansing was taking place following a military crackdown in the region, which caused thousands to flee. Some have called for her Nobel Peace Prize, which she received in 1991, to be revoked. Suu Kyi, who previously stood up to Myanmar's military dictatorship, spent 15 years under house arrest between 1989 and 2010.

According to the New York Times, last year Malala Yousafzai was one of several Nobel laureates, as well as other leaders and philanthropists, who signed an open letter urging the United Nations to take action in Myanmar, where "a human tragedy amounting to ethnic cleansing and crimes against humanity is unfolding."

Yousafzai is the youngest-ever recipient of the Nobel Peace Prize. She received the honor in 2014, and earlier this year was designated a U.N. Messenger of Peace. Yousafzai advocated for girls' education in her home country of Pakistan, and survived a shooting attack by the Taliban in 2012. She founded the Malala Fund in 2013, and continues to speak out on human rights issues around the world, including treatment of refugees.